Well, kids, now you know for sure. You’re parents (and grandparents) ARE having sex. At 68, Billy Joel and his fourth wife, Alexis Roderick, are expecting their second child next month. The happy couple already have a 2-year-old daughter named Della Rose. In a recent interview, Billy said, quote, “[Della] is pretty good. She sleeps through the night. I hope the next one will…Â I hang out with her and watch her little wheels spin. And she’s a hoot. She’s a funny kid. She loves to laugh.